CA2168511A1 - Synchronized video/audio alarm system - Google Patents

Synchronized video/audio alarm system

Info

Publication number
CA2168511A1
CA2168511A1 CA002168511A CA2168511A CA2168511A1 CA 2168511 A1 CA2168511 A1 CA 2168511A1 CA 002168511 A CA002168511 A CA 002168511A CA 2168511 A CA2168511 A CA 2168511A CA 2168511 A1 CA2168511 A1 CA 2168511A1
Authority
CA
Canada
Prior art keywords
alarm
alarm system
control circuit
audio
audio alarm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002168511A
Other languages
French (fr)
Other versions
CA2168511C (en
Inventor
Joseph Kosich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cooper Wheelock Inc
Original Assignee
Wheelock Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23611367&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2168511(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wheelock Inc filed Critical Wheelock Inc
Publication of CA2168511A1 publication Critical patent/CA2168511A1/en
Application granted granted Critical
Publication of CA2168511C publication Critical patent/CA2168511C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Abstract

An audio/visual alarm system which includes multiple microprocessor-controlled alarm units connected in a common loop to a fire alarm control panel and an interface control circuit. The interface control circuit causes brief interruptions in power to the alarm units which synchronize operation of the alarm units and which can also be used as alarm control signals. The interface control circuit allows for control of both audio and visual alarms using only the single common loop connection between alarm units.
CA002168511A 1995-03-20 1996-01-31 Synchronized video/audio alarm system Expired - Lifetime CA2168511C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/407,282 1995-03-20
US08/407,282 US5608375A (en) 1995-03-20 1995-03-20 Synchronized visual/audible alarm system

Publications (2)

Publication Number Publication Date
CA2168511A1 true CA2168511A1 (en) 1996-09-21
CA2168511C CA2168511C (en) 2008-08-05

Family

ID=23611367

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002168511A Expired - Lifetime CA2168511C (en) 1995-03-20 1996-01-31 Synchronized video/audio alarm system

Country Status (6)

Country Link
US (4) US5608375A (en)
JP (1) JPH08273086A (en)
CN (1) CN1129877C (en)
CA (1) CA2168511C (en)
ES (1) ES2121532B1 (en)
GB (1) GB2299191B (en)

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Also Published As

Publication number Publication date
ES2121532B1 (en) 1999-06-01
JPH08273086A (en) 1996-10-18
CN1131777A (en) 1996-09-25
GB9602470D0 (en) 1996-04-03
ES2121532A1 (en) 1998-11-16
GB2299191A (en) 1996-09-25
GB2299191B (en) 1998-10-28
CN1129877C (en) 2003-12-03
US5751210A (en) 1998-05-12
US20080266064A1 (en) 2008-10-30
US5608375A (en) 1997-03-04
US7907047B2 (en) 2011-03-15
US5982275A (en) 1999-11-09
CA2168511C (en) 2008-08-05

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